How much do you pay monthly for iPhone 5?

I want to get an iPhone but i don't know if ill have enough money each month. How much does it cost to get the phone and how much do you have to pay monthly for Verizon, AT&T, and tmobile?

A lot. But seriously it depends on way too many variables like how many Gb's you want on the plan, if you want a hotspot, taxes, insurance, 2year contract or not.
4s and 5 can go from free to $150. 5c from $99 and 5s $100-200 starting. Typically monthly phone bill for one person can easily run $80-100 a month depending on all of these things.
Tinker with their site and judge for yourself.
Best luck.
http://www.att.com/...hones.html

If concerned about that then you probably should choose one of the main carriers, go with one of the smaller carriers like straigth talk.